Improvement in apparatus for treating furnace slag or scoria



C. WOOD.

APPARATUS FOR TREATING FURNACE SLAG 0R SCORIA. No.188,763. PatentedMarch 27,1877.

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NPETES PHOTO LITHOGRPHER WASHINGTON B C W PATENT OFFICE CHARLES OFMIDDLESBOROUGH-ON-TEES, ENGLAND.

IMPRGVEMENT IN APPARATUS IOR TREATING FURNACE SLAG 0R SCORIA,

' Specification forming part of Letters Patent No. 188,763. dated March27,1877; application filed November 9, 1876.

To all whom it may concern I the manufacture of bricks, mortar, cement,

and concrete) from furnace slag or scoria.

In order to prepare the slag or scoria for use I employ a machine whichspreads and cools it, andreduces it to a state resembling shingle. y

The apparatus is composed of a circular table or trough, upon which,near the outside, the slag or scoria falls from the usual runner orspout as it comes out of the furnace, the table or trough revolving atlthe same time the slag is thus spread upon this table or into thistrough in a thin layer. Before the table or trough has completed itsrevolution, the partially-cooled slag or scoria comes in contact with afixed shovel or scraper, which removes the slag or scoria from the tableor trough, and it then falls over the side into wagons. The shovel orscraper is made so that it can be lifted out of action byla handle.While the wagons are being changed, the table or trough still continuingto revolve, the slag or scoria simply accumulates on the table or troughuntil all is again ready. If the slag or scoria is not suiciently cooledby the time it arrives at the shovel or scraper, I run a little waterupon it. That part of the table or trough upon which the liquid slag orscoria falls may be hollow, and I keep a current of water iiowin gthrough the hollow space to prel vent the table or trough getting toohot`and cracking. I make this table or trough to revolve by a pinionworking into the teeth of a wheel fixed under, or it might be above, thetable.

Figure 1 is a plan, and Fig. 2is a vertical section, of apparatusconstructed according to my invention. Y

a a is an axis or central post, and b b is a table mounted so as to beable to rotate upon it. Ihil table b receives a slow motion by means ofthe ring of teeth c, bolted to its under side, and the driving-pinion d,which is in gear with these teeth, or a wheel can be fixed upon the bowlg and driven by a pinion. e e are cast-iron slabs Xed upon and formingpart ot the table. The slag is dreceived upon them from Ythe trough j',into which it flows from the furnace. The slabs e are each cast upon awrought-iron zigzag pipe, c', and they are cooled when in use by waterilowng through these pipes. The water enters the pipes e' from the bowlg, which is supplied by a pipe, h, and the water ows down and escapesinto the trough o', which has an outlet at i.

To prevent the slag running off the table while it is yet fluid, thetable may be provided with a shallow rim on one or both sides, so as toform it into a trough. l l are scrapers for removing the cooled slagfrom the table and pushing it oi into the truck m. The scrapers aremounted upon a bar, l', and this bar can be turned to lift the scraperswhile a loaded truck is removed and replaced by an empty one.

If the table be provided with a fixed rim, forming a trough, thescrapers are so formed as to raise the slag or scoria over this rim, butthe plane-surface tableis preferred. Small streams of water may be runupon the slag before itis removed from the table, to cool it morecompletely.

Another way of forming the surface of the table is shown in plan at Fig.3 and in section at Fig. 4. The part which supports the slag is casthollow and kept full of water. Or, again, this portion of the table mayrotate within a stationary Water-trough, as is shown at Fig. 5.

Having thus described the nature of my said invention, and the manner ofperforming the same, I would have it understood that I claim- 1. Theapparatus for producing slag-shingle, such apparatus consisting of arotating table or trough, receiving, cooling, and conveying away theslag or scoria as it iiows from a furnace, and having scrapers combinedwith it to remove the slag or scorie from its surface, substantially asdescribed.

2. The combination, substantially as hereinbefore set forth, of therotating trough or table which receives the slag as it Hows from thefurnace, the water pipes or space beneath the surface of the table, thesupply-bowl or water-reservoir, and the pipes for conveying the watertherefrom to the table, for the purpose specified.

CHARLES WOOD. Witnesses:

JNO. T. BELK, Notary/Public, R. A. JoHNsoN, his Clerk.

